US5387449A
Expired / Lapsed
US
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Composites of plastic films and packaging made thereof
Assignee: 3A Composites International AG
•
Filing: 1993-05-12
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Granted: 1995-02-07
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Expires: 2013-05-12
Abstract
Abstract The invention relates to composites of plastic films and packaging forms made thereof that feature a permeability barrier layer, said forms of packaging being made from a composite featuring, from outside to inside, for example the layers a o ) a polyester film of thickness 6 to 23 μm, b) a ceramic layer of thickness 10 to 500 μm, for example of the general formula SiO x , a) a polyester film of thickness 6 to 23 μm, if desired with a further ceramic layer b) and c) a polyolefin film of thickness 15 to 200 μm. The invention relates also to the use of the packaging forms e.g. pouch, net, or self-standing pouch forms for foodstuffs, foodstuff preparations semi-luxury consumables and semi-luxury consumable preparations.
Inventors
- 👤 Peter Kunz
- 👤 Joachim Roncoroni
- 👤 Andreas Rothschink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:06
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B9/00; B32B9/04; B32B9/045; B32B27/32; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B9/005; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/139; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
Composites of plastic films, including a permeability barrier layer, in which said composites comprise a o ) a polyester film of thickness 6 to 23 μm, a) a polyester film of thickness 6 to 23 μm, c) a polyolefin film of thickness 15 to 200 μm, wherein one ceramic layer b) selected from the group consisting of silicon oxide having the formula SiO x , where x is a number from 1.1 to 1.9 and aluminum oxide having the formula AlyOz wherein y/z is a number from 0.2 to 1.5 of thickness 10 to 500 nm, is provided between the layers a o ) and a) .
Claim 2
Dependent Claim
107 words
Composites of plastic films, including a permeability barrier layer, in which said composites comprise a o ) a polyester film of thickness 6 to 23 μm, a) a polyester film of thickness 6 to 23 μm, c) a polyolefin film of thickness 15 to 200 μm, wherein one ceramic layer b) selected from the group consisting of silicon oxide having the formula SiO x , where x is a number from 1.1 to 1.9 and aluminum oxide having the formula AlyOz wherein y/z is a number from 0.2 to 1.5 of thickness 10 to 500 nm, is provided between the layers a o ) and a) .
Claim 3
Dependent Claim
30 words
Composites of plastic films according to claim 1 wherein the polyolefin film c) is a polypropylene film selected from the group consisting of cast polypropylene film and oriented polypropylene film.
Claim 4
Dependent Claim
27 words
Composites of plastic films according to claim 2 wherein the layers a) and a o ) each represent a polyester film of thickness 10 to 15 μm.
Claim 5
Dependent Claim
21 words
Composites of plastic films according to claim 2 in which the layer c) has a thickness of 25 to 150 μm.
Claim 6
Dependent Claim
33 words
Composites of plastic films according to claim 1 in the form selected from the packaging group consisting of sealed seam pouches, tube-shaped pouches, self-standing pouch forms of packaging, sachets, wraps, sacks and bags.
Claim 7
Dependent Claim
39 words
Composites of plastic films according to claim 1, in which the oxygen-barrier property, measured in (cm 3 /(m 2 ×day×bar)), is smaller than 1.8, measured in accordance with ASTM D 3985-81 at 25 deg. C. and 50% relative humidity.
Claim 8
Dependent Claim
13 words
Composites according to claim 6 wherein the oxygen-barrier property is smaller than 0.6.
Claim 9
Dependent Claim
13 words
Composites according to claim 7 wherein the oxygen-barrier property is smaller than 0.3.
Claim 10
Dependent Claim
37 words
Composites of plastic films according to claim 1, in which the water vapor-barrier property in (g/m 2 ×day), measured in accordance with ASTM F 372-78 at 25 deg. C. and 90% rel. humidity is less than 0.6.
Claim 11
Dependent Claim
14 words
Composites according to claim 9 wherein the water vapor-barrier property is less than 0.4.
Claim 12
Dependent Claim
37 words
Composites of plastic films according to claim 1, in which the oxygen-barrier property, measured in (cm 3 /(m 2 ×day×bar) at 25 deg. C. and 50% rel. humidity, after subjection to sterilization conditions, is less than 2.0.
Claim 13
Dependent Claim
14 words
Composites according to claim 11 wherein the oxygen barrier property is less than 0.8.
Claim 14
Dependent Claim
36 words
Composites of plastic films according to claim 1 in which the water vapor-barrier property in (g/m 2 ×day), measured at 25 deg. C. and 90% rel. humidity, after subjection to sterilization conditions, is less than 1.0.
Claim 15
Dependent Claim
14 words
Composites according to claim 13 wherein the water vapor-barrier property is less than 0.9.
References Cited (Backward Citations)
US3442686A
Cited
US4702963A
Cited
DE3300411A1
Cited
US4528234A
Cited
US4552791A
Cited
EP0240571A1
Cited
US5100720A
Cited
EP0312333A2
Cited
US4912103A
Cited
US5112673A
Cited
US5151317A
Cited
US5085904A
Cited
US5223346A
Cited
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| 3.5 Years (Year 4) | 1998-02-06 | 1998-08-08 | 1999-02-07 | $2000.00 | Window Closed / Lapsed |
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